I have a SA 300 that I use with a Tyors 2. I think it would do fine for what your doing. I've used it with good results in a dou(keyboards/vocals and acoustic guitar) The only thing I don't like about it is it makes alot of white noice. It only bugs me when I'm practicing at home. In a normal gig situation it's not audible.
I haven't heard an BA330 yet so I can't give much input other than folks here seem to be really happy with it.
What are you using now?
[This message has been edited by montunoman (edited 03-25-2010).]